Avaliação temporal e espacial da qualidade da água do córrego Jaguapirú do município de Dourados - MS

Abstract

Even though Brazil is a country that has abundant water resources, it is not free from the threat of a water crisis, as the availability of fresh water varies greatly from one region to another, and furthermore, the country's drinking water reserves are decreasing, and environmental studies and monitoring are extremely important for controlling and evaluating the quality of natural resources. The objective of this research was to evaluate the water quality of the Jaguapirú stream in the Municipality of Dourados-MS according to physical chemical aspects on a spatial temporal scale. The study was carried out from November 2018 to October 2019, being conducted in selected stages based on the seasonal cycles (drought and rain) of the region. The variables analyzed comprised the physicochemical parameters: dissolved oxygen, total acidity, total alkalinity, hardness, chlorides, turbidity, total solids, consumed oxygen (organic matter). The data collection shows that there may be releases of domestic effluents or sources of pollution, although the changes in the results are small. Therefore, it is important to carry out collections at other points between the source and the mouth, in order to evaluate the real effect of this source of pollution, as well as trying to locate the points where inadequate disposal occurs. The Jaguapirú stream presents a relatively satisfactory quality when compared to the established limits, presenting values above expected only for dissolved oxygen and turbidity. The effect of seasonality is significant, modifying the values from the rainy period to the dry period, however it is ideal to carry out quantitative analyzes in order to validate the results obtained.